[Khalid]

My future plan is to add tooling cabinets between front and rear legs bracing. Lets see how it look in the design. The updates will be soon uploaded for your review.
Regards

[CarveOne]

I had assumed that you had not finished adding the additional supports in your CAD drawings and my suggestion was more of a reminder than a real suggestion. Your plans sound excellent.

CarveOne

[Khalid]

Got very little time today and utilized it adding the horizontal support members at front and rear legs of the table.

[mcphill]

Kahlid,

I suggest you add at least one diagonal on the tabletop. The way you have it now, the whole thing can rack with a hard "whack" on the corner of the machine. You would hate to have that happen after you have spent all the time to get it square! A single full length diagonal, bolted to the bottom of the metal stringers, would add a LOT of strength. If you can put a few in there, and maybe an X instead of a diagonal, the more the better... You added this principle on the table end legs, just apply it similarly to the table top itself.

[Khalid]

Kahlid,

I suggest you add at least one diagonal on the tabletop. The way you have it now, the whole thing can rack with a hard "whack" on the corner of the machine. You would hate to have that happen after you have spent all the time to get it square! A single full length diagonal, bolted to the bottom of the metal stringers, would add a LOT of strength. If you can put a few in there, and maybe an X instead of a diagonal, the more the better... You added this principle on the table end legs, just apply it similarly to the table top itself.

Hi Phil,
I think a lot about your suggestions of cross-bracing and still puzzled why i require them. Might be i didn't understand very well. I am attaching the picture where you will see How the Table top is reinforced:
1- Stringers are attached with the end-rail beams with Two bolts at each ends. Total 07 stringers will make the table rock-solid.
2- The wooden strips at the top that are attached to each stringers will further reinforce the table top.
3- The MDF sheet that will be screwed on those wood will also help in further reinforcement.

Now the Legs:
1- I have added the bracing to the legs and further reinforcements can be added with small Angle irons pieces bolted to the legs and the Rail-beams.

Please suggest where i need reinforcement.:cheers:
Regards

[RomanLini]

...
Please suggest where i need reinforcement.:cheers:
Regards

Those are nice renderings Khalid!

About the reinforcement, it looks like you have no triangulation on your whole table surface. You may risk trapzoidal flex (when a rectangle deforms to a diamond).

Maybe you could run some slats under the table structure diagonally?

[Khalid]

Those are nice renderings Khalid!

About the reinforcement, it looks like you have no triangulation on your whole table surface. You may risk trapzoidal flex (when a rectangle deforms to a diamond).

Maybe you could run some slats under the table structure diagonally?

Hi Roman,
I think i should add some more reinforcement to the legs as well as beneath the 7 stringers . I want to machine Aluminum with this machine so the more it reinforced the less trouble i will get Thank you for the valuable suggestions.

Yesterday i received partial order from cncrouterparts which includes 03 Nema 23 stepper motors, 02 screws 5-start 14" length, 05 cables and one ahren Carriage.
CNCRouterParts
Today i visited the Aluminum casting facility where i order total 16 casting of carriages. The cost of casting/machining for 16 Ahren's carriage was 300 US dollars.The cost per complete carriage was near about 18 US dollar.
I must say here that the quality of cncrouterparts are perfect but importing 16 carriages from USA to my country involves huge custom duty and shipment charges (536 US dollar+ shipment+custom duty+taxes). Discussed the matter with Ahren and took his permission for duplicating the rest here.(Based on ahrens authorization might i become the sales distributor in this region of the world:stickpoke(chair))
Here are few pictures and a video of the process.
[ame=http://www.youtube.com/watch?v=TADwdKlvX3I]Aluminum Casting Ahrens Carriage.flv - YouTube[/ame]

[vrf]

That is pretty awesome.

Now I'm wondering how I can cast aluminum parts...

[cornbinder23]

Well, thats a first for me seeing metal casting in sandals

Looking good Kalid!

JTCUSTOMS

[Khalid]

Well, thats a first for me seeing metal casting in sandals

Looking good Kalid!

JTCUSTOMS

Yes with sandals only but in the following video you will see they have no PPE's at all---no goggles, no gloves, no mask and working in loose clothes(chair).. These are very poor guys getting small orders and threatening their life...
[ame=http://www.youtube.com/watch?v=VcarirIQGpg]Casting of Ahrens rails.flv - YouTube[/ame]

[Khalid]

@Vref
Thank you
I installed the Y-axes Arms on the carriages.

[RomanLini]

...
Now I'm wondering how I can cast aluminum parts...

If you are in a city, look in the yellow pages under "foundry" and there are probably local foundry shops. You can give them a master (what they call a "pattern") made in wood, and they will give you back the same piece made in aluminium. There can be a bit of shrinkage, and some issues with the angles on the sides of the piece ("draft") so you should discuss details with the foundry first.

Sorry Khalid that was a bit off topic!

[Khalid]

Sorry Khalid that was a bit off topic!

Hi Roman,
Thanks for answering the question Did a little work on the Y-axis beam and here is the updated pictures. The build is surely going very heavy and unmanagable when assembling.. May God give me enough courage to complete it.. Actually the whole accuracy process is in the hand of bender, if he failed to replicate the parts or somewhere between two identical part i found the dimensional vriance..All things will be ruined :stickpoke

[CarveOne]

Hi Khalid,

I am watching with interest this weekend although I am away from home visiting with family members. Have no fear, this machine will come together very nicely.

CarveOne

[Khalid]

Hi Khalid,

I am watching with interest this weekend although I am away from home visiting with family members. Have no fear, this machine will come together very nicely.

CarveOne

Hi CarveOne
Good to hear you are in touch with family.. I love the people that give time to their family and friends, this is what the actual life is with family and friends..

I have only two months period to complete the machine and the first carving target is before the 31st December. I hope i will be able to bend the metal parts in the coming Sunday. So thinking on each aspect of each part very carefully and taking every thing you guys are posting about the improvement in my design consideration.
Here is a quick render of the machine so far.

[mcphill]

I believe you will have racking issues. There will be tons of sheer on the two bolts at the end of each stringer. It will be easy to deform the table in to a diamond, at which point you will loose all your X to Y axis alignment. Go ahead with what you have, but if you find you have issues keeping it square (and I think you certainly will) you can add diagonal bracing at a later time.

Take a hint from this link: https://www.google.com/search?q=trus...w&ved=0CFUQsAQ

It is a proven technique and sound engineering practice...

[Khalid]

Hi Phil,
Should i install the diagonal bracings under the table or on the 4-legs of table?

[mcphill]

Hi Phil,
Should i install the diagonal bracings under the table or on the 4-legs of table?

If that question is directed to me, my name is Mike Phill(ips), so please call me Mike :wave:

My suggestion is to brace the tabletop itself to resist racking. Racking is when a nice square tabletop is turned in to a diamond or rhombus due to lack of bracing. You are correct, though, that you could also greatly stiffen the structure if you ALSO put diagonal bracing between the legs and the tabletop. You can never put in "too much" bracing! Too little is a problem.

[Khalid]

If that question is directed to me, my name is Mike Phill(ips), so please call me Mike :wave:

My suggestion is to brace the tabletop itself to resist racking. Racking is when a nice square tabletop is turned in to a diamond or rhombus due to lack of bracing. You are correct, though, that you could also greatly stiffen the structure if you ALSO put diagonal bracing between the legs and the tabletop. You can never put in "too much" bracing! Too little is a problem.

Hi Mike, Off-course you are the only "Phil" involve in this discussion
:cheers: However nice to knew your complete name
I will soon update the drawings for your review

[rocketflier]

That is pretty awesome.

Now I'm wondering how I can cast aluminum parts...

You can see from Khalid's videos how high tech an operation it is. The only thing stopping you from casting in a week or so is you.

[ame=http://www.youtube.com/watch?v=NbvgTYotK8E&feature=related]Home built foundry - YouTube[/ame]

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